Poppet valve



Nov. 13, 1923.

E. H. SHERBONDY POPPET VALVE Filed April 9, 1920 www/@M4 patented Nov.,i3?, T1923..

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. or DETROIT, MICHIGAN., y

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To all whom't may concern.'

Be it known that I, EARL H. SHERBONDY, a citizen `ofthe United States ofAmerica, residing at Detroit, in the county o -Wayne 5 and State ofMichigamhave invented cer- Atain new and useful improvements` in PoppetValves, of which the following is a specification, reference being hadthereinto the accompanying drawings. The invention relates to poppetvalvessof that type in which the actuating cam directly engages the endof the valve stem. It

1s construction permitting of adjustment) of the length of the stem andalso rigidlylocking the same in its position of adjustment It is afurther object to provide a shifting surface for contact with the cam,`which avoids unequal wear. With these and other` Aobjects in-view theinvention comprises the construction as hereina'fterset forth.

ln the'drawings: t

Figure 1 is a longitudinal section, partly in elevation, in the plane ofthe axis of the valve stem; Y

Figure 21s an elevation viewed at right angles to Figure l;

-Figure y3 is a plan View thereof.

A is the poppet valve, which is provided with an integral stem B havinga threaded portion C `at its outer end. D is the cam shaft arranged inthe aXial plane of the stem and having its axis perpendicular tor theaxis of the stem.` E is the cam upon the object of the invention' toobtain a the shaft D which rotatesiin a plane slightly offset from theaxis of the stem. p The cam E actuates the stem B by engaging a bearingface thereon, which is in a plane perpendicular to the axis of the stem.This bearing Jface must, however, be adjustable in relation to thefstem,so as to provide -for proper seating of the valve and to avoid excessiveclearance, which would result in no ad du ise and wear. lt is alsoessential that the justment means shall be rigidly locked ring operationto avoid displacement.- l ve, therefore, devised an exceedingly simpleand effective adjustment and locking means which is constructed asfollows:

F is a disk or head member -providedrwith a hub portion G internallythreaded for en tra ging the threaded portion of the stem, is a seconddisk or head member also provALvn. l 1920. serial No. statin.

vided with a hub portion I of greater length andhaving its outer endinternally threaded for engagement with lthe threaded portion C. The hubl is of greater diameter than the hub G andl is recessed to receive thelatter. The recess is-alsov of a tapering form, while the hub G iscorrespondingly tapered to form a wedged engagement therewith. The hub Gis further longitudinally slotted to be collapsible in diameter so thatthe wedging action of the hub li thereupon will cause a firm clampingofthe threaded portion of the hubG`to the threads on the stem B. e

The disk` or head H forms a collar or abutment for one end of a'spring Jfor closing the valve againstI its seat, while the hub I forms a guidefor slidably engaging the bearing` for the stem; s shown, the bean ingfor the stem comprises a member K which is recessed to receive the hub land has a portion of smaller diameter for directly engaging the stem B.lt is also provided witha tlange L, which forms the opposite abutmentfor the springv J.

M is `a diskmember. having a hardened outer face for contacting with thecam E and provided with a central hub N, which engages a recess in thehead or disk F, so

`as to be 'rotatable therein.

lVith the construction as described to ad-v just' the valve inrelationto the cam, the disk or head H is turnedr by means of a suitable toolengaging peripheral ,notches O therein so as to back the hub l away fromthe hub G, releasing the clamping pressure thereon. This will permitadjustment of the disk F towards or from the, cam, so that the valvewill seat andithe clearance between the member M and the cam will be assmall as desirable. The member F may then be locked by turning themember H in a reverse direction, which wedges against the hub G. Thisnot only holdsl the memberl H from'turning,.,but also takes up allclearance between the threads of the hub G and the threads C on thestem, so that the structure will be perfectly rigidi in operation.during the revolution of the cam E, it will actuate the member Flongitudinally oi the axis of the stem to litt and seat the valve and atthe samev time the member F will be revolved, due toits offset relationto the axis of the stem. This will change the area of contact .and willavoid wearing. in one spot.

What I claim as my invention is:

1. The combinationwithva poppet' valve and its actuatingstem, of a head-member having a hub threaded upon said stem, said hubA being slitted topermit of radial con-l traction, a second head member below the memberaforesaid and provided with a relatively long hub having a portionsurround ing the irst-mentione clamp the same upon said stem and havinga portion threaded upon said stem below the first-mentioned hub, thesecondimember and its hub being adjustable toward the valve to permitadjustment of the firstmentioned member and its hub in either directionupon second head portion threaded upon said stem directly engaging saidthe stem, said'second member and hub being I 20 2also adjustable toclamp the rstfmentione hub in adjusted. position on `said stem.

2. The combination with a pop et valve and its actuatin stem, of a heamember having a hub t readed upon said stem, a below the memberaforesaid provided with a relatively lonfr hub havin a portionsurrounding the hub aforesaid ain adapted to clamp the same uponsaidstem,

the second hub also having a cylindrical elowthe first-mentioned hub,anda bearing for said stem having a portion receiving the cylindricalportion of the second-mentioned hub, and having a portion ofSmaller'diameter second-mentioned hub. y

3. The combination with a poppet valve and its actuating stem, of a headlmember hub and adapted to- 4stern below the.

havin a hub threaded upon said stem, a seconc head below the memberaforesaid provided with 'a Arelatively long hub sur? rounding the hublaforesaid and 'adapted to clamp the saine upon said stern,V the secondhub having a cylindrical portion threaded uponsaid stem below thefirst-mentioned havin -a hub threaded upon said stem, a

secon head member below thel member aforesaid and provided with larelatively long hub havin a portion surrounding the first-,mentioned ubandv adapted to clamp the same upon said stem, the second hub alsohaving a portion threaded upon said stem` Y below the, first-mentionedhub, the second member and its hub being adjustable toward the valve topermit adjustment ofthe rstmentioned memberand :its hub in eitherdirection' upon the stem, said second member Y and hub being alsoadjustable away from the valve to clamp the first-mentioned hub inadjusted osition upon said stem, and a disk having a hardened outersurface for engagement with a cam and `having a hub rotatably mounted inthe rst-mentioned member.

' In testimony whereof I aiiix my-signature.

EARL H. SHERBON DY.

